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Coil, also known as steel Coil. Hot-rolled steel coil, cold-formed into a roll. For the convenience of storage and transportation, it is convenient to carry out various processing (for example, processing into steel plate, steel strip, etc.).

Molding is mainly hot-rolled coil and cold-rolled coil. Hot rolled coil is processed product before recrystallization of billet. Cold rolled coil is the follow-up of hot rolled coil. Coil general weight is about 15-30T. This year, China's hot-rolled production capacity continues to expand, there have been dozens of hot-rolled production lines, there are some projects to be built or put into operation soon.

Steel coil sales mainly for large customers, the general user does not open the device or a limited amount of use. Therefore, the follow-up processing coil will be a promising industry. Of course, the larger mills now have their own unwinding and leveling project.

It consists of 55% aluminum, 43% zinc and 2% silicon solidified at a high temperature of 600 ° C. The whole structure consists of aluminum-iron-silicon-zinc and forms an alloy of dense quaternary crystals.

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Galvanized steel has many excellent features: strong corrosion resistance, is 3 times the pure galvanized sheet; the surface of a beautiful zinc flower, can be used as building house board. Its characteristics are: corrosion resistance

(The corrosion resistance of "Galvanized Steel Coil" is mainly due to the protective function of aluminum and aluminum.When the zinc is worn, the aluminum forms a dense layer of alumina to prevent further corrosion of the corrosion-resistant material

internal. ), Heat resistance (aluminum-zinc alloy steel plate has good heat resistance, can withstand 300 degrees Celsius temperature, and the high temperature oxidation resistance of aluminum plate is very similar),

Heat Reflectance (Galvanized steel has a high thermal reflectance, twice that of galvanized steel and is often used as a material for insulation.) Economical (because 55% AL-Zn is denser than Zn small

, So in the case of the same weight and the same thickness of the gold plating, galvanized steel than the plated steel plate area of 3% or more). Galvanized sheet post-processing are: DRY dry; OIL oiled;

Chromate chromic acid passivation; AFP / Galva clean fingerprint resistant; Non-Gr, Gr-free cadmium-free fingerprint resistance. The company is located in:

Color coils, organic coated color coils coated in various colors

Board hence the name, referred to as Caitu volumes. The company is located in:

The use of hot-dip galvanized steel strip as a substrate for the color coated steel strip in addition to the protection of zinc, zinc coating on the organic coatings played a protective and covering,

Prevent steel rust, life is longer than galvanized, about 1.5 times. The company is located in:

 Caitu volume with light,

Beautiful and good anti-corrosion properties, but also direct processing, mainly used in construction, household appliances, electrical appliances, furniture industry and transport. The company is located in:

Choi Choi coating used according to the use of different environments choose the right resin, such as polyester modified silicone, polyvinyl chloride plastic sol, polyvinylidene chloride. Users can choose according to the purpose.

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Physical properties of steel:

Mechanical properties of steel is to ensure the final performance of steel (mechanical properties) of an important indicator, it depends on the chemical composition of steel and heat treatment system.

In the steel pipe standard, according to different requirements, the tensile properties (tensile strength, yield strength or yield point, elongation) and hardness, toughness,

There are user requirements of high and low temperature performance. The company is located in:

Tensile strength (σb)

The maximum force (Fb) the specimen is subjected to during tensioning,

Out of the original cross-sectional area (So) of the resulting stress (σ), known as the tensile strength (σb), in units of N / mm2 (MPa).

It represents the maximum capacity of a metal material to withstand damage under tension. The formula is:

Where: Fb - when the sample pulled off the maximum force, N (Newton);

So - the original sample cross-sectional area, mm2. 

Yield point (σs)

With yielding metal material, the sample does not increase the force during the stretching.